The WTRCTV10-400-510-0.2-1.6-50-1 from Wainwright Instruments is a Tunable Filter with Frequency 0.4 to 0.51 GHz, Tunable Frequency 110 MHz, Bandwidth 0.2 MHz, Rejection 50 dB, Insertion Loss 0.75 to 2.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCTV10-400-510-0.2-1.6-50-1 can be seen below.